Elevator-brake



3 Sheets-Sheet 1.

(No Model.)

J. ROSE. ELEVATOR BRAKE.

No. 486,168. Patented Nov. 15,1892.

IN VENTOH ATTORNEY.

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.QZM $292M (No Model.) 3 Sheets- Sheet -2.

. J. ROSE.

ELEVATOR BRAKE.

No. 486,168. Patented Nov. '15, 1892.

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(No Model.) 3 Sheets-Sheet 3.

J. ROSE.

ELEVATOR BRAKE.

Patented Nov. 15, 1892.

WITNESSES:

A TTOHNE).

UNITED STATES PATENT OFFICE.

JOSEPH ROSE, OF MEMPHIS, TENNESSEE.

ELEVATO R-BRA K E.

SPECIFICATION forming part of Letters Patent N 0. 486,168, datedNovember 15, 1892.

, Application filed May 21, 1892.

' full, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form part of thisspecification.

This invention relates to certain improvements in elevator-brakes.

The object of the invention is to provide an improved automatic brakefor hand-elevators exceedingly cheap, simple, and durable inconstruction and very effective in operation, whereby the movement orspeed of the elevator can be easily regulated, so that all danger of theelevator racing up or down is avoided. 1

The invention consists in certain novel features of construction and incombinations of parts more fully described hereinafter, and particularlypointed out in the claims.

Referring to the accompanyingdrawings, Figure 1 is a diagrammatical viewof the ole vator. Fig. 2 is a top plan of the gearing, &c., at the upperstory of the building. Fig. 3 is an elevation. Figs. 4 and 5 aredetails, and Fig. 6 shows a modification.

In the drawings, the reference-letter a indicates the elevator-car.

1) indicates the ways at the sides of the ele-- vator-shaft. At theupper and lower ends of the shaft suitable supports are provided for theshafting.

0 indicates the hoistingdrum mounted at the upper end of theelevator-shaft-on horizontal shaft d. The hoisting-cable e is wound onthe hoisting-drum and at its lower end is secured to the elevator-car.

f indicates the counter-weight moving in suitable ways in theelevator-shaft and suspended on cable f passing up over pulley f to andwound on the hoisting-drum, so as to counterbalance the car.

9 indicates the main or master pulley or wheel mounted on shaft 9' atthe upper end of the ele vator-shaft. This shaft has a pinbrake iswithdrawn.

Serial No. 433,843. (No model.)

ion 9* rigid thereon meshing with gear-wheel d on the hoisting-drumshaft. The handoperating or controlling cable It passes around anddepends from said pulley throng out the length of the elevator-shaft andthrough or under guides at the lower end of the shaft. This hand-cablepasses loosely through or in close proximity to the car, so that theoperator can grasp the cable, and thereby rotate the main pulley ineither direction desired to pull the car up or down. The hand-cablerotates the pulley and its shaft and pinion, which rotates thehoistingdruin through the medium of its shaft and gear to raise or lowerthe car in a manner well known and understood.

A suitable brake is provided to operate on some part of the gearcontrolling the movement of the elevator. This brake is here shown asand preferably operates on themain pulley.

t' indicates a sliding block or brake-shoe sliding in ways t" toward orfrom the periphery of the main pulley, which has a wide flange for thispurpose.

j indicates a shaft mounted in suitable bearings at the upper end of theelevatorshaft and screw-threaded at one end, which end screws into a nutin the brake-shoe, the shaft j, 850., being so arranged that when turnedin one direction it will force the brakeshoe against the pulley withgreat power, and thereby stop rotation thereof and hold the car againstup or down movement, and when the shaft rotates in the oppositedirection the The screw-shaft is provided with spools j, on which thebrake-op crating cable It is wound or attached. This cable passes undersuitable pulleys at the lower end of the shaft. At or near each floorthis brake-cable is provided with stops Z m. Each stop is conical ortapered and formed in two or more longitudinalsections fitted on thecable and secured together and rigidly to the cable by means of screwsor rivets "it, passed through the sections and the cable, wherebyexceedingly strong rigid stops are formed on the cable. The stops Ztaper upwardly and form stops against upward movement of the car, whilethe stops m taper downwardlyand form stops against the downward movementof the car. These stops are pref- ICO erably located at or near thedifferenttioors or other places where thecar is intended to stop. Thecaris provided with suitable means or attachments-such as gates,jaws,catches, or the liketo engage said stops and operate the brake mechanismto apply the brake and stop the car. Separate jaws or catches or othermeans are preferably provided to engage said stops and respectivelyarrest the car against up-and-down movement. These attachments carriedby the car preferably consist of a pair of movable jawsq for each sideof the brakecable. The meeting, ends of the jaws are V- shaped andbeveled, so that when the jaws are held yieldingly together by springs0" an opening will be left through which the brakecable can freely pass.Suitable frames 3 s are provided for these jaws. These frames aresecured to the side of the car and have horizontal ways in which saidjaws slide toward and from the brake-cable. A system of le yers t t isprovided for each pairof jaws and is connected with each jaw to separatethe same. Controlling-cords u, respectively, for each system of leversextend throughout the length of the elevator-shaft over pulleys at theends thereof, and each controlling-cord is at one end secured to the carand at the other end to its respective jaw-operating lever or levers, soas to operate said lovers to open the aws when the controlling-cord ispulled in the proper direction, down or up, as the case may be.

The safety attachments or catches just described are arranged to engagethe square or shouldered ends of the upwardly and downwardly taperedstops, respectively. Thus when the elevator is going up the jaws of onesafety attachment or catch Wlll be separated by the downwardlytaperedstops on the brake-cable to allow the stops to pass through, while thejaws of the other safety attachment, embracing the other side of thebrake-cable, will engage the large end of one of the upwardly-taperedstops, and will thereby draw up the brake-cable and rotate thescrew-shaft in a direction to force the brake-shoe against the mainpulley, and thereby stop the upward movement of the car.

To permit the continuance of the upward movement of the car, theparticular catchcontrolling cord to is pulled to separate the jaws toallow the same to pass the stop. The brake-cable is then pulled down torotate the screw to release the brake from the main pulley. The car isnow free to move up the next stop having the bottom large end. Theoperation is the same when the car is going down, only the other set ofcatches and stops are thrown into play. If desired, the operator in thecar can open the various catches as they approach the stops, and thusavoid stopping the car at each floor unless the car attains anundesirable high rate of speed, when the catches can be allowed toengage the stops and immediately stop the car.

Various constructions of catches or stops carried by the car can beemployed, and I do not limit myself to any specific construction. InFig. 6 a double catch is shown; or, in other words, a single framecarries the catches or jaws or gates to arrest the car in bothmovements, whether upward or downward. This construction is providedwith a circular way a, in which the outer ends of the jaws q slide, allfour jaws being near a common center on a cross-bar. The jaws have theedge notches to receive the brakecable, and each pair of jaws is heldtogether by a suitable spring, as shown. Each pair of jaws is operatedby a lever r, pivoted to the supporting-frame and connected to therespective jaws by links 5' in such a way that the jaws of which pairwill be swung open when the lever thereof is swung laterally by thecontrolling-rope.

The brake is self acting or automatic. Hence it is an impossibility forthe car to run away when, either through carelessness or ignorance, theold style of brake is not prop erly applied, as the present brakeautomatically stops the car at every floor, thereby preventing the carrunning into the gearing or through the roof.

The many and great advantages and utility of this invention are obviouswithout fur ther explanations.

It is evident that various changes might be made in the forms,constructions, and arran gements of the parts herein specificallydescribed without departing from the spirit and scope of my invention.Hence I do not wish to limit myself to the constructions disclosed.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. The combination, with an elevator-car and its hoisting mechanism, ofa brake to act on said hoisting mechanism, a brake-controlling cableextending throughout the elevatorshaft and provided with tapered orconical stops at intervals thereon, adjacent stops on the same side ofsaid cable, tapering in the same direction, and spring-catches on thecar, constructed and arranged to open and pass said stops when the smallends thereof are engaged, and thereby not move the cable, but to movethe cable when engaging the other ends of the stops, and means to openthe jaws or catches.

2. In combination, the elevator car and hoisting mechanism, a brake tostop the car, a controlling-cable for said brake, extending throughoutthe elevatorshaft and respectively provided with oppositely-taperedstops at intervals thereon, a pair of spring jaws or catches for eachcontrolling-cable to engage the stops and move the cable for the purposeset forth, and means for opening each pair of aws.

3. In combination, an elevator-car, a hoisting mechanism thereforcomprising a hoisting-drum provided with a counter-weight mechanism, amain pulley for operating the hoisting-drum, and a hand-cable passingover said pulley and through the elevator-shaft, a screw-threaded shaft,a brake-shoe on said shaft to move thereby into and out of engagementwith said pulley, an operating-cable for said screw-shaft, extendingfrom said shaft throughout the elevator-shaft and provided with stopsarranged at intervals thereon, and the spring-jaws on the car arrangedto engage said stops to apply the brake, and connections for openingsaid jaws, substantially as described.

4. In a hand-elevator, the combination of the elevator car, the hoistingmechanism comprising the main pulley, a screw-threaded shaft, abrake-shoe mounted thereon and moved thereby into or out of engagementwith said pulley, an endless controlling-cable extending throughout theelevator-shaft from said screw-threaded shaft to rotate the same andprovided with oppositely-tapered stops at intervals on its opposite.sides, respectively, and catches arranged substantially as described onthe car that engage said stops and move the cable to apply the brakes.

5. The elevator-car provided with apair of notched jaws or catches,springs yieldingly holding the same together, ways in which said jawsslide, means for opening the jaws, a connection secured to said meansfor controlling the jaws and extending throughout the elevator-shaft,the hoisting mechanism, a brakecontrolling cable extending through theshaft catch when the car is going down, substan- J tially as described.

7. In combination, an elevator-car and its operating mechanism, anendless cable controlling said mechanism and extending throughout theelevator-shaft, the opposite sides of said cable being respectively'provided with oppositely-tapered stops, two pairs of swingingspring-controlled jaws on the car, each side of the cable respectivelypassing between the jaws of one pair, levers arranged to open said jaws,and a connection extending through the shaft and connected to saidlevers to open the jaws, substantially as described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

JOSEPH ROSE.

Witnesses:

T. O. VINTON, T. J. NEALIS.

